Victorinox makes a very nice peeler

Don’t. That is a thin skinned potato.

If you can understand the accent, this is the best way to peel potato's,

https://www.youtube.com/watch?v=drVqGhjI558

You can heat them, then rapidly cool them in cold water and the Peel will slip right off.

Might not be the most energy efficient way.

Boil them with the skin on and use the back of a small knife to easily remove the skin after. This is how we'd make mashed potatoes where I once worked.

Man I love potato skin

If I peel potato skins, I usually keep them to make a vegetable stock.

Don't

If I need to peel a potato, I go around the flat sides in a single motion and then 3 or 4 peels on each flat side to take the rest off. Mostly just keep the skin on.

If efficiency is the goal, spiral is good. If speed is the goal, rapid cuts are best. If both speed and efficiency are the goal, go mechanized.

I rest one side of the potato on a cutting board and then work my way around it with a peeler (from top to bottom). Afterwards I do the edges separately. Takes about 15-20 seconds per potato.